Derivatives (Earned Income On Derivatives) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Total earned income	$ 422	$ (18)	$ 854	$ 276
Derivatives Designated as Hedging Instruments [Member] | Net Investment Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total earned income	44	31	111	102
Derivatives Designated as Hedging Instruments [Member] | Interest Credited to Policyholder Account Balance [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total earned income	24	39	88	110
Derivatives Designated as Hedging Instruments [Member] | Other Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total earned income	(1)	(1)	(2)	(5)
Derivatives Not Designated or Not Qualifying as Hedging Instruments [Member] | Net Investment Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total earned income	(1)	(2)	(3)	(5)
Derivatives Not Designated or Not Qualifying as Hedging Instruments [Member] | Net Derivative Gains (Losses) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total earned income	282	62	650	277
Derivatives Not Designated or Not Qualifying as Hedging Instruments [Member] | Policyholder Benefits and Claims [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total earned income	$ 74	$ (147)	$ 10	$ (203)